Improvement in balanced valves for steam-engines



uli-Ten Srfnris nfrnNT 'erica :WILL/IAM '.Tosms, on CLEvintANDY,on`1o.

iMPaoi/MENT INBALANCED VALVES Foa STEAMQENGINES Specification forming of Letters PatentNo, 412,2??3. dafecLApril 12,1861-1-v I 'To alltphom ttsmay concern: v i j valve-plate C, with a steamvvayithe saine size "..Ble/fit. known that I, JosLIN, 'of Cleveasin the platextl. f t ff land,in lthe county4 of Cuyahogaand State of E is the adjustable top plate, with the steaxn- Ohio, have invented a 'new ,and useful Im, WayFthrougli the center, and the steam:` provementiin theSlide- Val've for Steam-Enf spacejj2 between'the flexible diaphragm and gines; and I do herebydeclarethat the fol` upper portof, the plate E. The flexible dialowi g is a full and exact description thereof, reference' being `had toV the accompanying drawings, and to the letters ofreference marked thereon, making part-of this speci'cation. i The natu-re of my invention consists of ali- `improvement (o n my application for'Letters'f Patent, examined andl allowed th'e'clth day' of lDecember, 1863, or 'thereabo\1t) in relieving the slide-valve ofthe vsteampressuie, and -vorking the; valve steam-tight Without a steamLtight box or 4,chest bymeans of steam pressure. Figure'lis-'a `side elevationv taken through thejcenter. Fig. 2.is anend-elevation taken' justing valve-plate C, and liexiblediaphragm throughthejeenter. F'gf is atop view'ot" 1I, andheldfirmlybyscrewing'til'enutsagainst` the cylinder-face orvalve-seat, showing steam the top and bottom ofthe plate E. and exhaust ports.' 'Fig. 4isan'inside view of When `steam is allowed to pass from the the adjustable top plate,.:exible diaphragm, boiler by means of a steam-pipe through the and self-adjustable' valve plate. l Fig. 5 is a steam-entrance F, the steam-spacejjz, steambot'tom View ofthe sidevalva/showing steamwayk, and steamwayf, the' valve B` becomes ways and exhaus t-ca'vity.-A vFig.(isatop-view filled. If the stea'mv'vays 'o o2 are equal in ofthe slide-valve, showing steam-entrance.. area to the steamway f, the steam will not A in Fig. lis the cylinder-face or valvesea t. I press the valve down against the cylinderface side-of the plate E, as shown in Fig.. 4.

similar to the common steam-chest bolt. .fr :v2 are nuts working-in screw-threads on the- -nut x2 Works on the under side of the plate E,

E. By mean-s lof the bolts and nuts theplate -F is readily adjusted in relation to the cylinderface'or valvevseat A, slide-valve B, self-ad a a2 are steam port-s leading'into the cylinor valve-seat, or up against the valve-plate C. der. The cylinder is not shown in the draw' The valve will 'therefore move very free, but 4if ings. Y v b is'the escape o'r exhaust portsv .v

B is the s lide-val ve,fmadet'o Work steamtight on the sides, ends, and top. tion to the excess of area in the steamvvay j.

002 are steamvvays whichallow steam to- By this means thesteam a pressure can be passinto the cylinder When-they comein conmade to equalize the exhaust'pressure, and junction with the steam-ports au? inthe the .valvelnade to work steamtightupon the cylin ler-face or valveseat. cylinder'face or valveseat, and' by means of the steamways o o2 then the steam will press the phragm D is fastened steam-tight to the under y .G Gr2 are bolts fastened firmly in the corners o f the cylinder-face. at right angles therewith.,

bolts G G2. The plate E has four corner holes, I through' which thefo'ur corner bolts pass. The

and the nut .r o'n the' upper Vside of the plate theste'amway fis made larger vthan the.

valve down against the valve-seat in propore -1's t-he exhaust-eavity, .vvhich. allows the flexible diaphragm the valve B Works steamsteam to escape when moved overfthesteam tight under the valve-plate 0. The steamground steam-tight upon the cylinderface 'or press the valve-plate G downagainst thevalve valveseat.' I 1 L I B. The steam-pressureis easily effected more C is a/self-adjust-ing valve-plate ground orless by adjusting thepl-ateE by means of steam-tight upon thetop 'ofthe-valve. the bolts and nuts above mentioned. If the port-a or al?. The bottom ofthe valve'B is` space j i2 causes the flexible diaphragm to f is a steamway throught-he topA of lthe valve is not perfect-that is to say, if one side valve. or one end is thinner than the other-the valve- `lc is asteainway through the self-adjusting plate G readily adjusts itself to the imperfecvalve-p1ateC. tion ofthe valve by means of the .exible Dis the liexible diaphragm, fastened steamdiaphragm. i It may, in fact, be advantageous tight to the'upper side of the self-z ldjusting l in an yupright or vertical engine to have the lower' end of tbe slide-valve a little thinner or D and vnlveplate C with the valve B, as abov wedge like. It would eet as :L counter-bai described f l ance to a heavy 'valve for ay large en gine, t'ne 2. fortune the side-valve steamtight 0 inclination ofthe wedged-shaped valve being its nnfner and ower surinces by means 0 made so as to equa-ilze the weight oi une valve, stemn-'nressnre without,- a. steam-tight box o es it descended and ascendedl between the chest, as nerein ser. with. cylinder-ieee or valve-seat and seit adjusting I WM. JOSMN. valve-plate.

After thus describing my invention7 what I` 'Wltnesseszl Wish to secure by Letters Patent is G. H. BENHAM, 1. The combination ofthe iiexible diaphragm L. N. zllis'rMANr 

